{"product_id":"4mm-heat-shrink-tubing-2-1-ratio-wire-sleeving-wrap","title":"4mm Heat Shrink Tubing 2:1 Ratio – Wire Sleeving Wrap, 7 Colors","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right length of heat shrink tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the total length of wire or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For example, 10M (≈32.8 ft) is typically enough for a mid-size automotive wiring harness. If you work on large projects regularly, the 50M or 200M roll offers better value per meter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does 2:1 shrink ratio mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A 2:1 ratio means the tubing shrinks to half its original diameter when heat is applied. This 4mm tubing will shrink down to approximately 2mm, creating a snug, insulating sleeve around your wire or connector.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this heat shrink tubing be used outdoors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This tubing is generally suitable for protected outdoor use. For fully exposed, long-term outdoor or marine applications, we recommend confirming UV and moisture resistance with us before ordering, as environmental conditions vary.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What wire sizes does 4mm heat shrink tubing fit?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Before shrinking, 4mm tubing typically fits wires and connectors up to approximately 3.5mm in diameter. After shrinking (2:1 ratio), it conforms tightly to items around 2mm in diameter. It is generally compatible with wire gauges in the AWG 10–18 range, though actual fit depends on insulation thickness.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature is needed to shrink this tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard polyolefin heat shrink tubing typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool; avoid open flames as they can scorch or uneven-shrink the tubing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this tubing RoHS compliant and safe for electrical use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This heat shrink tubing is made from polyolefin material, which is generally RoHS-compliant and widely used in electrical insulation applications. For projects requiring certified compliance documentation, please contact us to confirm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy a custom length, or only the listed options?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"We offer a range of pre-cut lengths from 1M up to full rolls (200M or 400M depending on color). If you need a specific quantity not listed, contact us and we will do our best to accommodate your order.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e4mm Heat Shrink Tubing — Reliable Wire Insulation for Every Project\u003c\/h2\u003e\n    \u003cp\u003eWhether you're rewiring a vehicle, tidying up a home electrical panel, or protecting splices on a marine build, loose or exposed wire ends are a constant frustration. This 4mm heat shrink tubing gives electricians, automotive technicians, and serious DIYers a clean, durable way to insulate and bundle wires without tape that unravels or connectors that corrode.\u003c\/p\u003e\n    \u003cp\u003eEach order is cut to your chosen length — from a single 1M (≈3.3 ft) strip up to a full 200M (≈656 ft) or 400M (≈1,312 ft) roll — in your choice of seven colors: White, Red, Green, Blue, Transparent, Yellow, and Black. The tubing is made from polyolefin with a 2:1 shrink ratio, meaning it shrinks from 4mm down to approximately 2mm when heat is applied, forming a tight, uniform sleeve. Lengths are available in 1M, 5M, 10M, 20M, 30M, 50M, 100M, 200M, and 400M options.\u003c\/p\u003e\n    \u003cp\u003eIdeal for automotive wiring harness repair, electrical panel wire management, RC hobby builds, marine cable protection, and DIY home electrical projects — this color-coded heat shrink tubing makes circuit identification and professional-looking wire dressing straightforward.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003eℹ️\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits wires and connectors up to approximately 3.5mm in diameter before shrinking. Generally compatible with AWG 10–18 wire gauges. Shrinks with a standard heat gun at approximately 90–120°C (194–248°F). Not recommended as a substitute for adhesive-lined tubing in fully submerged applications.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 4mm Heat Shrink Tubes\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔥\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e2:1 Shrink Ratio\u003c\/strong\u003e — Shrinks from 4mm to approximately 2mm, creating a snug, uniform sleeve that conforms tightly to wire insulation and connector bodies for secure coverage.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e7 Color Options\u003c\/strong\u003e — Available in White, Red, Green, Blue, Transparent, Yellow, and Black, making color-coded wire identification easy in automotive, marine, and panel wiring applications.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Length Selection\u003c\/strong\u003e — Order exactly what you need, from a 1M (≈3.3 ft) sample strip to a full 400M (≈1,312 ft) bulk roll, reducing waste on small jobs and cutting cost on large runs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePolyolefin Construction\u003c\/strong\u003e — Made from polyolefin material, which is widely used in electrical insulation for its resistance to moisture, chemicals, and abrasion in standard indoor and protected outdoor environments.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eEasy to Cut and Apply\u003c\/strong\u003e — Cuts cleanly with standard scissors or a utility knife; slides over wire ends before termination or over connectors for a finished, professional look on heat shrink wire repair jobs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eShips from US Warehouse\u003c\/strong\u003e — Stocked and fulfilled domestically for faster delivery, so your wiring project doesn't wait weeks for an overseas shipment.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 4mm Polyolefin Heat Shrink Tubing\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eHeat Shrink Tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNominal Diameter (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003e4mm (≈5\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Ratio\u003c\/th\u003e\n\u003ctd\u003e2:1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecovered Diameter (After Shrink)\u003c\/th\u003e\n\u003ctd\u003eApproximately 2mm (≈5\/64\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolyolefin\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eWhite, Red, Green, Blue, Transparent, Yellow, Black\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e1M, 5M, 10M, 20M, 30M, 50M, 100M, 200M (roll), 400M (roll)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShrink Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically 90–120°C (194–248°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Wire Gauge\u003c\/th\u003e\n\u003ctd\u003eGenerally AWG 10–18 (confirm by pre-shrink OD ≤ 3.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness (Before Shrink)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eNote:\u003c\/strong\u003e Wall thickness, voltage rating, and operating temperature range vary by color batch. If your application requires certified specifications, please contact us before ordering.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right length of heat shrink tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure the total length of wire or splice you need to cover, then add at least 10–15% extra for overlap and trimming. For example, 10M (≈32.8 ft) is typically enough for a mid-size automotive wiring harness. If you work on large projects regularly, the 50M or 200M roll offers better value per meter.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does 2:1 shrink ratio mean?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eA 2:1 ratio means the tubing shrinks to half its original diameter when heat is applied. This 4mm tubing will shrink down to approximately 2mm, creating a snug, insulating sleeve around your wire or connector.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this heat shrink tubing be used outdoors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis tubing is generally suitable for protected outdoor use — for example, under a hood or inside a weatherproof enclosure. For fully exposed, long-term outdoor or marine applications, we recommend confirming UV and moisture resistance with us before ordering, as environmental conditions vary.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat wire sizes does 4mm heat shrink tubing fit?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eBefore shrinking, 4mm tubing typically fits wires and connectors up to approximately 3.5mm in outer diameter. After shrinking (2:1 ratio), it conforms tightly to items around 2mm in diameter. It is generally compatible with wire gauges in the AWG 10–18 range, though actual fit depends on insulation thickness — always measure your wire OD before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat temperature is needed to shrink this tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eStandard polyolefin heat shrink tubing typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool; move it evenly along the tubing to avoid scorching. Avoid open flames, which can cause uneven shrinkage or damage the sleeve.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this tubing RoHS compliant and safe for electrical use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThis heat shrink tubing is made from polyolefin material, which is generally RoHS-compliant and widely used in electrical insulation applications. For projects requiring certified compliance documentation, please contact us to confirm before placing your order.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I buy a custom length, or only the listed options?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWe offer a range of pre-cut lengths from 1M up to full rolls (200M or 400M depending on color). If you need a specific quantity not listed, contact us and we will do our best to accommodate your order.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your color and length above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"White \/ 1M","offer_id":52330746446098,"sku":"LC3056x1","price":1.35,"currency_code":"USD","in_stock":true},{"title":"White \/ 5M","offer_id":52330746478866,"sku":"LC3056x5","price":1.9,"currency_code":"USD","in_stock":true},{"title":"White \/ 10M","offer_id":52330746511634,"sku":"LC3056x10","price":3.13,"currency_code":"USD","in_stock":true},{"title":"White \/ 20M","offer_id":52330746544402,"sku":"LC3056x20","price":5.43,"currency_code":"USD","in_stock":true},{"title":"White \/ 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50M","offer_id":52330746839314,"sku":"LC3057x50","price":12.88,"currency_code":"USD","in_stock":true},{"title":"Red \/ 200M=1Roll","offer_id":52330746872082,"sku":"LC3057x200","price":48.08,"currency_code":"USD","in_stock":true},{"title":"Green \/ 1M","offer_id":52330746904850,"sku":"LC3058x1","price":1.35,"currency_code":"USD","in_stock":true},{"title":"Green \/ 5M","offer_id":52330746937618,"sku":"LC3058x5","price":1.9,"currency_code":"USD","in_stock":true},{"title":"Green \/ 10M","offer_id":52330746970386,"sku":"LC3058x10","price":3.13,"currency_code":"USD","in_stock":true},{"title":"Green \/ 20M","offer_id":52330747003154,"sku":"LC3058x20","price":5.56,"currency_code":"USD","in_stock":true},{"title":"Green \/ 30M","offer_id":52330747035922,"sku":"LC3058x30","price":8.0,"currency_code":"USD","in_stock":true},{"title":"Green \/ 50M","offer_id":52330747068690,"sku":"LC3058x50","price":12.88,"currency_code":"USD","in_stock":true},{"title":"Green \/ 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5M","offer_id":52330747625746,"sku":"LC3061x5","price":1.9,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 10M","offer_id":52330747658514,"sku":"LC3061x10","price":3.13,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 20M","offer_id":52330747691282,"sku":"LC3061x20","price":5.44,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 30M","offer_id":52330747724050,"sku":"LC3061x30","price":8.0,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 50M","offer_id":52330747756818,"sku":"LC3061x50","price":12.88,"currency_code":"USD","in_stock":true},{"title":"Yellow \/ 200M=1Roll","offer_id":52330747789586,"sku":"LC3061x200","price":48.08,"currency_code":"USD","in_stock":true},{"title":"Black \/ 1M","offer_id":52330747822354,"sku":"LC3062x1","price":1.35,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5M","offer_id":52330747855122,"sku":"LC3062x5","price":1.84,"currency_code":"USD","in_stock":true},{"title":"Black \/ 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